Taisha uses the elliptical cross-trainer at the gym. Her general goal is to burn 280 calories per workout, but she varies by as much as 25 calories from this amount on any given day. Write and solve an equation to find the maximum and minimum number of Calories Taisha burns on the cross-trainer.

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305 and 255

To find the maximum and minimum number of calories Taisha burns on the cross-trainer, we need to consider her general goal of burning 280 calories per workout and the variation of 25 calories.

Let's denote the calories burned on any given day as 'x'. The minimum number of calories she burns can be calculated by subtracting the maximum variation (25 calories) from her general goal:
Minimum = Goal - Variation = 280 - 25 = 255 calories.

Similarly, the maximum number of calories she burns can be calculated by adding the maximum variation (25 calories) to her general goal:
Maximum = Goal + Variation = 280 + 25 = 305 calories.

Therefore, the minimum number of calories Taisha burns on the cross-trainer is 255 calories, and the maximum number is 305 calories.

It would be similar to the thermometer problem:

http://www.jiskha.com/display.cgi?id=1346371286

Take the goal and add or subtract the variations to get the upper and lower limits.

Try it and post your answer for a check if you wish.